Stretching device for the treatment of fractured bones.



-G. PETRY;` STEETGEING DEVICE -EoE TEE TREATMENT 0E PRAGTURED BONES.APPLICATION FILED DBO. 27, 1912.

1,101,954, Patented .mne- 30,1914

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EIL/TTL,

' the GUSTAV PETRY, 0F WIESBADEN',4 GERMANY.

STRETCHING DEVICE EOR THE TREATMENT OF FRACTURED BONES.

Specication of Ifetters Patent. Application led December 27, 1912.Serial No. 738.909.

Patented J une 30, 19M.

To all whom it may concern.'

Be it known that I, GUSTAV PETRY, merchant, a citizen of the GermanEmpire, and

resident of Wiesbaden, Germany, with the post-office addressMauritiustrasse 9, have invented new and useful Improvements inStretching Devices for the Treatment of Fractured Bones, of which thefollowing is a specification.

The present invention relates to a distraction clamp with ball jointsfor the treatment of fractured bones.

The invention consists in the provision, at outer ends of each of thesleeves of the locking attachment which surround and engage with theright-and-left handed screw spindle, of a ball-bearing cup which isprovided with a set screw and adjustment ring, cach of said cups beingadapted to engage and tix the ball head of a splint bar.

The invention is shown in the accompanying drawing wherein- Figure l isa longitudinal section on A*B of 3: Fig. 2 an elevation and Fig. 3 aplan of the stretching device. Fig. 4 shows the screw spindle orpressure screw alone, with the ends of the corresponding sleeves. Y

The apparatus mainly consists of two tension sleeves a connectedtogether by a tension screw, and each provided at its outer end with anenlarged bore for the reception of a ball joint consisting of a ballhead CZ, pressure cup f, and set screw g. By turning the tension screw,which extends in opposite directions and is provided on the one sidewith a right-hand thread and on the other with a left-hand thread, thetension sleeves are forced apart.

Elongat'ed metal plates c are riveted on the ball head, and these areembedded in the plaster of Paris splints when the apparatus is used. Thewhole apparatus may be made of steel or brass, and tinned. The ball headof the ball joint is securely held in the widened bore of the pressuresleeve by a. threaded metal ring c screwing on the pressure sleeve.

fast by means of a screw g which presses the pressure cup against theball head.

The ball joint is made When all four of the ball joints have beenloosened on the plastered splints on the two longitudinal sides ofthefractured limb and the plaster splint cut through in a circle, thelower portion of the fracture can be moved inwardly or outwardly, and upor down, and also turned inwardly or outwardly, that is to say, itsposition can be changed in all directions so that it becomes possible tocounteract any shifting of the ends of the fracture.

Now what I claim and desire to secure by Letters Patent is thefollowing:

A surgical appliance for treating bone fractures comprising a pair ofsleeves provided with right and left hand screwthreads, each sleevehaving at one end a ball A receiving socket, splint bars-each having aball connected with its face by a shank eX- tending laterally to thebar, means for retaining the balls in the said sockets while permittingthe splint bars to tilt in any direction, means for lockin the balls andhence the splint bars in their adjusted positionsand a right and lefthand screw spindle engaging the threads in the sleeves to move thesleeves and hence the splint bars toward and away from each other.

In testimony, that I claim the as my invention, I have signed my name inpresence of two witnesses, this twel-fth day of December 1912.-

GUSTAV PETRY. Witnesses:

HERMAN PEIsoHER, MINNA RITZL.

foregoing

